Circuit closer



Nov. 23 1926.

H. J. MUNSTER CIRCUIT CLOSER Filed July 25. 1925 3 Sheets-Sheet 1 Har/'yd' Mams wf? a@ dimmi* Nov. 23,1926. 1,607,799l

' l H. J. MUNSTER CIRCUIT CLOSER Filed July 25, 1925 3 Sheets-Sheet 2 Nov. Z3 l CIRCUIT CLOSER Filed July 25. 1925 3 Sheets-Sheet 3 Patented Nov. 23, 1926.

HAB/RY JjlMUNSTER, F SAN DEG-O, CALIFORNIA.

CRCUT CLOSER.

Application filed July 25, 1925. Serial No. 46,111.

- scribe in my United States Let-ters Patent No. 1,479,811, dated January 1, 1924.

The primary object of'the present invention is to generally simplify and improve devices of the above kind whereby the same may meet with all of the requirements for a successful commercial use. t

Another object of the invention is to provide a circuit closer of the above kind which is extremely simple and durable in const-ruction as well as efhcient and entirely reliable in operation.

Still another object of the invention is to provide improved means for automatically raising the film contacting armclear of or above the flanges of the hlm reel and to simultaneously break the signal circuit upon opening the door of the film magazine preparatory to removing the film reel therefrom.

Gther objects will appear as the nature of the invention is better understood, andthe same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference characters indicate corresponding parts throughout the several views, j

Figure 1 is a fragmentary horizontal section of a film reel magazine. equipped with a circuit closer constructed in accordance with the present invention,

Figure 2 is a side elevational view of the device shown in Figure 1,

Figure 3 is an end elevational view looking towards the right of Figures 1 and 2,

Figure 4 is an enlarged fragmentary view taken in vertical transverse section substantially upon line 4 4 of Figure 1,

Figure 5 is a view similar to Figure 4 taken substantially upon line 55 of Figure 1,

Figure 6 is a view similar to Figure 5 and taken substantially upon line 6-6 of Figure 1,

Figure 7 is adetaileu sectional view of parts of the invention taken substantially upon line 7--7 of Figure 3, j

Figure 8 is a view similar to Figure 7 taken substantially upon line 8-8 of Figure 3,

Figure 9 is a sectional view taken substan tially upon line 9 9 of Figure 1, and

Figure 10 is an enlarged fragmentary pern spective view of a detail of the invention carried by the film magazine door. Y y

Referring more in detail to the drawings, 5 indicates a conventional form yof upper film reel magazine of a motion picture machine, which magazine is closed at one side by means of .a swinging door 6 which is hinged upon a vertical axis as at 7 to the front'endof the magazine 5 in the usual way. As is well knownin the art, the door 6 is swung open for permitting insertion of a film reel into the magazine or Vremoval ofthe saine therefrom as found necessary. Suitably fixed to and projecting through the other side wall of the magazine 5 adja cent the front end thereof is a bearing sleeve 8 whose inner end terminates substantially mid-way between the sides of the magazine and within which is journaled a sha-ft 9. rflhe shaft 9 thus extends transversely of the magazine 5, and extending rearwardly from and at right angles to the shaft 9 is an integral film contacting arm 10 which is preferably of the upwardly curved form indicated by dotted lin-es vin Figure 2 and which is so disposed as to be in a. vertical plane substantially mid-way between the flanges of the film reel when the latter is operatively disposed within the magazine 5. The arm 10 has a roller 11 journaled upon its free rear end, which roller is preferably covered with a tube of soft material such as rubber', felt or the like. The roller 11 permits free rotation of the film reel and its yielding covering prevents marring of the film.

A/ittached to the arm 10 is a spring 12 preferably form-ed of resilient wire, and the free end of this spring 12 is disposed to retain the roller 11 upon the end of the arm 10. For this purpose the transversely extending shaft or end portion of the arm 10 upon which the roller 11 is j-ournaled may be provided with a socket int-o which the end of the spring 12 projects. Y

An arm 13 is secured to the projecting outer end portion of the shaft 9 exteriorly `of the magazine 5, an-d the arm 13 projects lill) Vthe operator or outer side or which is closedby means olf a removable cover 1'?, and the upper wall oii which is ormed with an opening 18 into which the adjusting screw 1&1 projects. A bracket 19 of conducting material is secure-d to a strip of insulating material 20 which is suitably secured to the inner side wall ot' the casing 16, and the horizontal upper end port-ion 'of the conducting bracket 19 has one end of a horizontal leat' s 'ng 20 secured thereto. The spring 2O projects rear-- wardly so as to terminate beneaththe opening 18, an-d secured upon the tre-e rear end ot' this spring 20 is a plate 21 ol' insulating material which is engaoed by the lower end of the screw 14C. A turther bracket 22 is secured to another insulating .strip 28 which is also secured to the inner side wall of the casing r163 rearwardly of the bracket 19, and this bracket 22 has an integral metallic cup 24 into which projects a contact pin 25 rigid with and depending` from the free rear end of the spring 2 The spring 20 is normally tensioned to tie); upwardly so that the plate 21 closes the opening 18 under normal conditions and the lower end ot the pin 25 is spaced above the bottom olf the cup 24C as well as concentric with thelatter as shown in Figure 5. The conducting brackets 19 and 22 have binding posts 26 and 27 to which are attached the wires 28, and it isV apparent that when the contact pin 25 is lowered to engage the bottom of the cup 24. current may pass 'from one wire to the other. f

Secured to the rear end oli the casing 16 is a T-titting 29 in branches ot which are adapted to be secured the well known tier:- ible metallic conduits 30 which torni protective coverings for the wires 28, the fitting 29 being provided with set screws 31 for this purpose. The wires 28 lead to source o t electricity, not shown, and included in tl il@ circuit ot this source ot electricity is a suitable signal element such as the lamp 3a.

Vhen the reel containing the lilm ik positioned within the magazine. 5, the roller 11 is disposed to bear upon the lilm3 and a, the lilni is unwound irc'a the reel dnrinf the projection ogt the picture play? the arziy 10 will lower by gravity until it reaches a predetermined point irnineeiately prior to complete ei-:hanstion el" tlc lilm from the reel, whereupon the Contact pin 25 engages the bottom oit the cup 2- so as to close tl'ie circuit of the signal element 32 for warning attendant ol the moving .to have the other .motion picture machine ready to be started. rflic arms 13 and 10 are ol' surlici it weigl t t overcome the action ot the spring 20, and the cup is adapted to contain oil or equivalent luid for preventing damage bv tire from sparks emitted between the contact pin 25 and the bottom ot the cup 24.

picture machine rec-mee it second arm 38 is secured to the projecting o3 r end portion ot the shalt 9, and this arin 33 normally projects forwardly and do fiiwardly to occupy the inclined position illustrated in Figure 2. The plate 15 has an angular extension upon the torward end thereof, and this extension Sil projects inwardly so as to lie parallel with and in spaced relation to the frontend of the magazine as shown inA Figure 1. Pivoted to the extension is a bell crank lever which is arranged so that its arms project upwardly as shown in lligureV 3, the Jree end portion oit the outer arm of the bell crank lever being disposed to overlie the arm m and having a downwardly OO and out-wardlv inclined lower edge portion as clearly shown in Figure 9. 'lh'e bell crank Lever is piroted upon a pin 3T at one end olf which is reduced as at 38 to project through a relatively small opening of the extension -l, and the ot er end ot which is enlarget to provide a head 39 iior retaining the bell cra. l; lever in place.A The reduced end portion ot the pin 3? is headed as at Ll() by a riveting operation so as to secure the saine to the extension tl-'l as shown clearly in Figure 7.

Ii pin 41 entends loosely through the free end ol;J the bell crank lever as shown in Figure 8, and this pin 41 is carried by a lock 42 that formed with a vertical transverse opening into which projects flic adjacent depen/cling end or a rod. 4. rllhe end 118 is loosely deposed in the opening ot the block and the p-in is held in place in the transverse opening or' the inner arin ot the bell crank lever Sby riveting or the like as at The rod l--ilf is disposed in a si'ibstantia-.lly horizontal position and projects from the *block past the hinge 'Y ot' the door where it terminates in outer arm oit the bell oo, will thus be seen that hen the door 6 is sierung open the nell ci" nk lever vwill be swung so that the uter arm thereof will pre downwartw upon the arm 33 and to swing upwardngt-gement of the coni tact pin from the lottom of the cup so as to )reak Lhe circuit of the signal elcment 32 and also causes the a 'in l0 to rise clear of the fla ot the reel so that the latter may be removed from the niagazine and a new tull reel inserted in place ist thereof. Then the arm 13 is thus raised the spring 20 will cause the plate 2l to cover or close the opening 18, and by reason of the inclined lower edge 36 of the bell crank lever 35, resist-ance to movement of the outer arm of the bell crank lever 35 along the upper edge. of the arm 33 is reduced. lt will be seen, that, by reason of the connections above described, the ends of the push rod l-l are substantially universally connected to the door G and the bell crank le ver 'for permitting the relative horizontal and vertical movements of the parts.

lith the above construction it will be seen that the. elevation of the arms l0 and 13 is effected immediately upon starting to open the door 6. It will also be seen that the only forwardly projecting part is the arm 33 which may be formed of quite a short length so that the machine may be placed close to the front wall of the operators booth,

The bearing sleeve 8 may be provided with an opening 49 for facilitating lubrication of s'haf 9, and the arms 18 and 33 are prefe ably attached to ends of collars 50 held to the shaft 9 by set screws 5l.

From the above description it will be seen that all current conduct-ing parts are properly incased so as to reduce the liability of fire to a minimum, and it is not necessary to completely open the door 6 before the arms l0 and 13 are actuated for respectively permitting removal of the reel and causing breaking of the signal circuit.

Minor changes may be made without de" parting from the spirit and scope of the invention as claimed.

What l claim as new is:

l. In a film exhaustion signal, a film reel magazine, a horizontal shaft journ'aled transversely through a side of said magazine and having a rearwardly projecting film contacting arm upon its inner end, a casing se'- cured 'to said side of the magazine exteriorly of the latter and having an opening in the top thereof, a rearwardly projecting arm fixed to the outer end of said shaft and extending above the casing, a vertical screw adjustably threaded through said second named arm coincident with said casing opening, a leaf spring mounted in said casing and havingan insulation plate upon its free end engaeeable by said screw, a contact fixed to the under side of the free end of said spring, ane a linen contact mounted in the casing beneath the contact of the spring, said spring being normally tensioned to bring the insulation 'plate against the top of the casing for closing the opening of theA latter and being flexible downwardly when the arms are allowed to lower for engaging the spring carriedcontact with the fined contact upon substantial exhaustion of the film 'from a reel in said magazine.

V1will be raised clear of the flanges of a 2. ln a device of the class described, a lihn reel` magazine closed at one side by means oaf a horizontally swinging door, a vertically swinging bell crank lever pivoted at the front end of the magazine, a rod having substantially universal connection at its ends respectively with the door and said bell crank lever, a horizontal shaft journaled transversely through the other side of the magazine and having a forwardly and downvardly projecting arm upon its outer end disposed beneath an arm of the bell crank lever, and rearwardly projecting film contacting and switch arms respectively carried by the inner and outer ends of said transverse shaft, whereby the film contacting arm will be raised clear of the flanges of a film reel in the magazine and the switch arm raised to circuit breaking position upon opening of the magazine door.

3. ln a device of the class described, a film reel maoazine closed at one side by means of a horizontally swinging door, a vertically swinging bell crank lever pivoted at the front end of the magazine, a rod having substantially universal connection at its ends respectively with the door and said bell crank lever, a horizontal shaft ljournaled transv rsely through the other side of the magazine and having a forwardly and downwardly projecting arm upon its outer end disposed beneath an arm of the bell crank lever, and rearwardly' projecting film contacting and switch arms respectively carried by the inner and outer ends ot' said transverse shaft, whereby the film contacting arm will be raised clear of the flanges or a film reel in the magazine and the switch arm raised to circuit breaking position upon opening of the magazine door, an arm of the bell crank lever having the lower edge portion thereoiJ forwardly inclined for engagement with the upper edge of said forwardly and downwardly inclined arm.

el. lua device of the class described,'a film reel magazine closed at one side by'means of a horizontally swinging'door, a vertically swinging bell crank lever pivoted at the front end of the magazine, a rod having substantially universal connection at its ends respectively with the door and ,said bell crank lever, a horizontal shaft journaled transversely through the other side of the magazine and having a forwardly and downwardly projecting arm upon its outer endV disposed beneath au arm of thebell crank lever, and rearwardly projecting film contacting and switch arms respectively carried by the inner and outer ends of said transverse shaft, whereby the'filin contacting arm film reel in the magazine and the switch arm raised to circuit breaking position upon opening of the magazine door, the universal connection between one end ofthe rod and EGO 

